VTK 3-axis logo

A part that projects to "V" along one axis, "T" on another, and "K" on another. A logo for the [Visualization Tool Kit](http://vtk.org/). Inspired by the cover for the book [Gödel, Escher, Bach](http://en.wikipedia.org/wiki/G%C3%B6del,_Escher,_Bach).